WO2000077397A1 - Pompe a pistons, procede et installation de filtration d'eau - Google Patents
Pompe a pistons, procede et installation de filtration d'eau Download PDFInfo
- Publication number
- WO2000077397A1 WO2000077397A1 PCT/FR2000/001642 FR0001642W WO0077397A1 WO 2000077397 A1 WO2000077397 A1 WO 2000077397A1 FR 0001642 W FR0001642 W FR 0001642W WO 0077397 A1 WO0077397 A1 WO 0077397A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pistons
- pumps
- shaft
- pump
- chambers
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
- F04B9/10—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid
- F04B9/109—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers
- F04B9/111—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members
- F04B9/113—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being liquid having plural pumping chambers with two mechanically connected pumping members reciprocating movement of the pumping members being obtained by a double-acting liquid motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/06—Energy recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
Definitions
- the object of the present invention is a method and an installation for filtering a liquid using a membrane filtration device.
- the technical sector of the invention is the field of manufacturing filtration devices with semi-permeable membrane.
- the present invention relates more particularly to a method and a device for desalinating seawater or brackish water by reverse osmosis, and to methods and devices for ultrafiltration of a liquid such as water, for provide water suitable for consumption or irrigation for example.
- a drawback of seawater filtration systems for desalination is their low efficiency: the energy consumed to obtain a cubic meter of desalinated water is of the order of 5 to 10 kWh; in the case where a turbine, such as a "PELTON” type turbine, is used to recover the energy of the supersalted water produced, the efficiency of the turbine being low, the overall efficiency of the installation is little improvement; in addition, such installations equipped with centrifugal pumps and turbines are of high cost, and of reliability and a relatively short service life.
- the water to be treated is delivered to the inlet of the filtration device, at an inlet pressure which is higher than the osmotic pressure of the water; generally, the water supply pressure at the inlet of the filter is at least equal to 25 bars, for example of the order of 30 to 1 00 bars, in particular of the order of 60 to 80 bars; on the one hand, a concentrated t of so-called “supersalted” water is recovered at the outlet of the filter, and on the other hand, a desalted water permeate (which is at a pressure close to atmospheric pressure); the pressure of the concentrate at the outlet of the filter is generally little lower than the pressure of supply of water to be desalted, for example less than this by a value of the order of 1 to 5 bars, since the drop pressure in the filter is low.
- the filter In less extensive filtration installations, in particular in nanofiltration installations for the treatment of brackish water, the filter is supplied with water to be treated at a pressure of the order of 10 bars, and a concentrate is recovered at a pressure of in the range of 4 to 8 bars.
- 3,825,122 describes a pumping device for the filtration of a fluid by reverse osmosis which comprises several aligned cylinders which delimit a main chamber for pumping the fluid, an auxiliary chamber (“booster”) used for recovery of the energy of the concentrate, and a hydraulic chamber for actuating the device by a hydraulic fluid pressurized by a pump, each chamber is provided with a piston movable in alternative translation under the action of a piston rod which is common to all pistons; although the objective announced in this document is to maintain a constant flow of pressurized fluid, the system for reversing the direction of movement of the rod by limit switches controlling distributors placed on the conduits connected to the chambers, does not ensure a continuous flow; this is probably the reason why this device, like all piston pump systems, has not known any effective industrial development for filtration by reverse osmosis.
- the membranes are indeed extremely sensitive to variations in pressure and flow rate which cause their clogging or rupture.
- US Patent 4,432,876 describes various devices aimed at reducing fluctuations in pressure and water flow at the outlet of the pump: A device for simultaneously varying the volume of the pumping chamber and the volume of the expansion chamber coupled to the chamber pumping; two variants of the device - with controlled valve and respectively with double flap piloted and mounted head to tail - cause the momentary communication between these two chambers, when the piston is at the end of its stroke, in order to limit the overpressures due to sudden openings and closing of the valves arranged on the water conduits, in addition this document proposes a device comprising three or more pistons - which are driven by a common crankshaft - or more, and recommends avoiding machines with 2, 4, 8 or 1 6 pistons In order to increase the compactness of the device described in US 4,432,876 and to delete the devices for varying the volume of the chambers, US Pat. No. 4,913,809 describes a pumping device with two pistons connected by a rod and driven by a double-acting hydraulic actuator, the pre s sion
- reverse osmosis installations essentially include low-performance centrifugal pumps, the piston pumping devices being too complex and unsuitable for pressurization. water delivered to membrane filters.
- An object of the present invention is to provide an improved liquid filtration method and installation.
- An object of the present invention is to improve the overall efficiency of these filtration methods and installations.
- the invention consists in proposing a water pumping device which comprises at least two pumps, each of the pumps comprising:
- the pumping device comprises an actuator capable of supplying the water with the energy necessary for its compression - deduction made of the energy of the concentrate recovered by said pistons -, by causing an alternating movement, generally periodic, translation (sliding) of the shaft and pistons of each of the pumps, and means for causing a prolonged stop of the shaft and of the pistons of each pump, at each end of course e, this is to be said twice for each period of the periodic movement, which makes it possible to avoid or greatly limit variations in the water pressure at the inlet of the filter (s).
- the pumping device further comprises means for accelerating one of said two pumps while another of said two pumps is in prolonged end-of-travel stop, which makes it possible to maintain the (cumulative) flow rate of water discharged by the pump. s towards the filter (s) at a substantially constant value.
- the expression "prolonged stop” designates a period of time during which at least one of said pistons - and generally the two pedestals of a pump as well as their associated shaft - are substantially stationary, said duration of prolonged stopping e st such that its ratio to the period of movement of the tree (and pis tones) is generally greater than 1 0 ⁇ , this ratio can reach very high values s - for example of the order from 0, 1 or more - in particular in the case where said two pumps do not have the same capacity; in this case, the prolonged stop of the higher capacity pump will be of a longer duration than that of the stop of the lower capacity pump.
- the two pumps will have the same capacity and will each be controlled so as to carry out an extended stop at the end of the race of duration substantially identical for the two pumps.
- At least one of the chambers of at least one of the pumps will preferably be equipped with a piston position sensor (and / or the shaft) which is positioned so as to emit a detection signal before said piston (and / or said shaft) reaches its end of stroke position; this detection signal is transmitted to an electronic control unit which, in response to the reception of this signal, controls the stopping of the supply of energy by said actuator to the pump in question
- the driving energy supplied by said actuator is preferably transmitted to water via a hydraulic fluid (motor) acting on a piston - called motor - linked to said shaft, in a similar manner to that described in the patents aroused; the prolonged shutdown of the delivery of the working fluid under pressure to the engine pedestal then causes the prolonged shutdown of the pump considered.
- the invention consists in proposing a water pumping device comprising two pumps, each pump comprising two aligned chambers each receiving a movable piston in translation in the chamber, the two tones being connected by a shaft sliding; the device also comprises a double-acting hydraulic cylinder for driving each pump, and a loop of circulation of hydraulic fluid (motor) under pressure, which is unique and therefore common to all of the hydraulic cylinders of the device pumping, the device further comprises means for selective communication of each cylinder with said loop which are controlled so that the sum of the flow rates of hydraulic fluid (motor) delivered to the cylinders is substantially constant in temp s , so that the sum of the water flows re trodden by the pumps of the device is substantially constant.
- Said common motor fluid circulation loop preferably comprises a single pump as well as a member for measuring the flow rate circulating in said loop.
- Said means of selective communication include means preventing, permanently, the simultaneous closing of all the circuits for delivering motor fluid to the jacks, consequently, when part of said means of selective communication are closed from so as to prevent the delivery of the working fluid to one of said jacks - to cause the prolonged shutdown of the corresponding pump -, at least part of said means for selective communication are open; given that the overall (cumulative) flow of working fluid remains constant, the flow of working fluid delivered to the other cylinders supplied by said loop, is then increased, this results in acceleration of the latter and of the pump (s) ( s) spondant corre
- Said selective communication means essentially consist of valves electrically controlled by the electronic control unit which receives signals representative of the position of the valves pistons, as well as, preferably, of a flow meter provided on said common loop; alternatively, this flowmeter measuring the overall flow of working fluid used by the pumping device, can be replaced by a flow meter placed on a water transport pipe discharged by the pumps to the membrane filter; it can also be replaced by several (at least two) flow meters placed on the oil transport pipes connecting each cylinder to the common loop; it can also be replaced by at least one sensor for the speed of movement of the sliding shaft of one of the pumps - at least -, in the case where the different pumps of the device are provided with chambers, sliding shafts and pistons of identical geometry; in this case, in fact, to ensure a constant overall flow of pumped water, it suffices to permanently maintain the sum of the speeds of the sliding shafts of the different pumps, at a constant value.
- each pump comprises a drive piston fixed in the middle of said sliding shaft; in this embodiment, each of said pumps comprises three pistons and a common sliding shaft for transmitting forces, each of the pistons being movable in alternating translation in a respective cylindrical chamber, the three chambers being aligned (along the longitudinal axis of the tree, which corresponds to the axis of translation of the pedons); two identical end pistons each serve, on the one hand for compressing the liquid to be filtered and on the other hand for recovering energy from the concentrate, and are respectively arranged at the two longitudinal ends of the shaft; the third piston - said motor - (of smaller diameter) is fixed on the shaft and arranged at equal distance from s two ends of the shaft; thus, each of the two end chambers (called common chambers) in which the two end pistons move respectively, is divided into two portions or cavities (of variable volume depending on the position of the piston) separated by the piston: first portion of each chamber, in the central part of which grout is part of the tree, is connected to the
- the structure of the device also makes it possible to reduce the mechanical stresses applied to the shaft, this structure allows the use of elongated chambers, in particular whose ratio of length to diameter is greater than or equal to 3, more particularly close to 5 to 10 or 10 to 20; this elongated (tubular) shape facilitates the production of bodies (delimiting the chambers) which must withstand high pressures; this also contributes to obtaining a continuously variable or constant flow, in order to eliminate (and / or significantly reduce) transient overpressures (at the end of the stroke), in particular by facilitating control of the speed of the pistons - (and consequently of the common tree).
- connection can be constituted by a ball joint or a cardan joint, allowing relative rotation along at least one transverse axis (for example perpendicular to the longitudinal axis), by a bearing allowing relative translation along the longitudinal axis, or else by a combination of these means of connection;
- the piston is not linked to the shaft, it has - as well as the shaft - a contact face (of support) on the end of the shaft: during the delivery of the water to be filtered under high pressure, the shaft transmits to the end piston via this face the force exerted by the working fluid on the central piston; during the filling of the end chamber by means (pump) of gavage under a low pressure, the end pedestal "follows" the end of the
- a water filtration installation comprises at least two pumps as above, which are connected in parallel at the inlet and at the outlet, the operation of which is kept phase-shifted and the speeds of which are controlled and / or controlled to ensure a flow rate (cumulative for the different pumps) of liquid (water) admitted at the inlet and liquid (water) presurized at the outlet, which are substantially constant (preferably to within 10%, in particular at at most 5%).
- the installation comprises two identical pumps, the shafts of which are mu s with a speed and a phase shift variable during of a cycle, the phase difference not being zero, nor equal to 1 80 °, the sum of the ab absolute values of the two trees of two trees being substantially constant over time.
- a first of the two shafts is accelerated for this purpose when the second shaft stops at the end of its travel (neutral); in addition, the end chamber portion can be connected to a source of pressurized fluid in order to allow the pressurization by this fluid of the water sucked by the piston (and / or discharged by an upstream booster pump) in this chamber portion, up to the normal supply pressure of the filter, in order to avoid a (temporary) drop in pressure at the inlet of the filter, when this portion of the chamber is placed in communication with the inlet of the filter, this temporary pressurization is carried out when the corresponding piston is at the end of travel (neutral) following the filling of this portion; for this purpose, this portion of the chamber can be temporarily isolated from the suction and discharge circuits.
- supersalt water concentrate
- - tubular water pumping chambers with a diameter situated in a range from 50 to 1,000 mm, in particular from 100 to 600 mm, are chosen: - the top speed of the shafts and pistons is maintained at a value situated in a range ranging from 0.1 meters per second to 10 meters per second, preferably from 0.25 meters per second to 3 meters per second;
- one causes the prolonged stop of the shafts and pistons at each end of the chambers ("top" and "bottom” dead center), in particular to carry out a water pressurization step, for a period of time whose ratio to the period of the movement of the tree is situated in a range going from 0.005 to 0.1, in particular close to 0.01 to 0.05;
- a hollow shaft is used to reduce the inertia of the moving element and the friction on the bearings.
- FIG. 1 schematically illustrates a seawater desalination installation comprising two identical pumps;
- Figures 2 and 3 illustrate the same installation in two different states of the pumping cycle.
- FIG. 4 is a histogram of the speed of the shaft of each of the pumps in FIGS. 1 to 3, which shows the variations of these speeds during a cycle.
- FIG. 5 illustrates in the same manner as in FIGS. 1 to 3, a similar installation where two-way solenoid valves are used in place of the distributors of FIGS. 1 to 3.
- FIG. 6 schematically illustrates means for maintaining the pressurization of the chambers of a pump.
- FIG. 7 illustrates in partial schematic view an alternative embodiment of the invention in which the installation comprises three pumps arranged in parallel.
- the installation 1 is intended for desalinating the water supplied at the inlet 2 by a pump - called a booster pump (not shown) under a pressure of 3 at 4 bars; for this purpose the salt water is pressurized by each of the two identical pumps 3, 4 at a pressure of 70 bars and delivered by conduits 5 to the inlet 6 of the filter 7 of reverse osmosis; the fresh water obtained is discharged at 8 while the supersalted water leaving at 9 from the filter 7, under a pressure of 69 bars, is transported to the pumps 3, 4 by conduits 10; the supersalted water transmits its energy to the seawater to be filtered in the pump and is discharged at 11 at a pressure of 1 bar.
- a pump - called a booster pump not shown
- the salt water is pressurized by each of the two identical pumps 3, 4 at a pressure of 70 bars and delivered by conduits 5 to the inlet 6 of the filter 7 of reverse osmosis; the fresh water obtained is discharged at 8 while the supersalted water leaving at 9 from the
- the additional energy necessary for the pressurization of the sea water to be filtered up to 70 bars, is supplied to each pump 3, 4 by a hydraulic unit 12 which delivers at output 13 an oil flow under pressure and a substantially constant flow; the oil is sent to the pumps via a pipe 14 and returns to the cover of the power station via a pipe 15.
- each of the pumps 3, 4 comprises: - a body 16 which delimits three cylindrical chambers 18a, 18b on the one hand, 19a, 19b on the other hand, and 20a, 20b of a third go ; these three tubular chambers aligned along the axis 17 are separated by two partitions 21, 22 pierced with an orifice equipped with a bearing provided with seals; and - a hollow shaft 23 extending along the axis 17 and carrying three pistons
- the shaft is mounted sliding in translation (according to the arrows 28) in the bearings equipping the partitions 21, 22; the middle of the shaft 23 is equipped with a drive piston 25 which can slide in the central chamber 19a, 19b under the effect of the pressure which is applied to one of its faces by the oil introduced, according to the desired direction of movement, in the portion 19a (or cavity) or on the contrary in the portion (or cavity) 19b, depending on the position of the distributor 27 connecting this chamber to the conduits 14, 15; the piston 24 separates the portions 18a and 18b from a first end chamber while the piston 26 separates the portions (or cavities) 20a and 20b from the second end chamber; the geometrical configuration of the mobile assembly is symmetrical with respect to a median transverse plane, as well as for the configuration of the chambers of the body 16.
- the control and command of the module and the direction of speed of movement of the two shafts is effected by the position variation command (and / or state) of the two hydraulic distributors 27 respectively associated with the two pumps 3, 4.
- This regulation can be controlled electrically or hydraulically by usual movens not shown.
- the oil discharged into the conduit 14 by the pump from the central unit 12 is partly transported into the cavity 1 9b of the pump 3 by the conduit 33b, and is partly transported into the cavity 1 9b of the pump 4 by the conduit 34b;
- the flow rate of the two oil streams circulating respectively in the two conduits 33b, 34b, which are a function of the position of the distributors 27, are adjusted to cause the starting of the pump 3 (from its bottom dead center) and for have a speed of 1 meter per second for the pump shaft 4, as illustrated in Figures 2 and 4, the distributors are then controlled to increase the oil flow in line 33b and simultaneously decrease the oil flow in the duct 34b, until these two flows are substantially balanced (identical) so that they have a movement (FIG.
- FIG. 4 shows that a stop stop at zero speed of 0, 1 takes place of duration e st effected at each neutral point (end of travel); the graphs of s speeds of the two pumps 3, 4 are phase shifted by a value which is variable for a period around a mean value of phase shift which is of the order of 1, 2 seconds, that is to say of 54 degrees taking into account the value (approximately 8 seconds) of the period of the movement.
- a heat exchanger marked 80 in FIG. 7 is preferably connected to the low pressure supersalted water evacuation pipe 35 as well as to one of the pipes 14, 15 for transporting oil to cool the oil.
- a member 36 sensitive to the proximity of the pedestal 24 (such as an electromagnetic sensor) is disposed in the vicinity of the longitudinal end of each chamber 1 8a, 20b and is connected to a reference control unit 81 Figure 7 for control valves and distributors.
- a pressurizing member is momentarily placed in communication with the cavity so as not to reduce the pressure from 4 to 70 bars; this can be achieved, as illustrated in FIG.
- the pumping installation illustrated in FIG. 7 comprises three identical pumps 3, 4, 60 which are connected in parallel at the inlet and at the outlet on the water suction and discharge pipes (not shown) in the same way as previously described.
- the hydraulic cylinder 61 associated with each pump for its drive is not disposed in the central part of each pump, but may be spaced from the body delimiting the suction cavities and discharge water to be filtered (1 8a, 20b) and supersalted water (1 8b, 20a).
- Each cylinder 61 comprises said driving piston 25 sliding in a cylindrical chamber 1 9a, 1 9b aligned with the chambers of the water pump 3, 4, 60 as associated with the cylinder, which worse 25 is linked by a rod 62 to the sliding shaft 23 of the pump;
- the rod (or secondary shaft) 62 is slidably mounted relative to the bodies of the jack 61 and of the pump as associated, by means of sealed bearings such as 63 provided through the walls of said bodies; so that the ratio of the cross sections of the cavities 20a, 20b is identical to that of the cross sections of the cavities 1 8b, 1 8a, a rod 64 of identical section to that of the rod 62 is fixed to the piston 26 and is slidably mounted at the through an orifice drilled in the pump body, thanks to a sealed bearing 65; the rod s 62, 64 are aligned, as is the shaft 23, along the longitudinal axis 1 7 common to the pump and to the jack, which is preferably horizontal, so that the weight of the movable assembly (rod
- the loop 66 common to the three pumps, for producing pressurized oil for driving the three jacks 61, comprises a pump 12 which discharges into a duct 1 4 fitted with a flow meter 67, and a duct 15 for returning oil to a tarpaulin 68 on which said cooler 80 is disposed.
- the oil presurized by the pump 1 2 is transported via the conduit 14 to the inlet of a distributor 68 whose return outlet is connected to the conduit 1 5.
- the distributor 68 causes the distribution of the oil flow delivered by the pump 12 to the cylinders 61 for the actuation of the pumps 3, 4, 60 as described above, under the control of the control unit 81 receiving the signals from the sensors 36, 67.
- each double-acting cylinder 61 is connected to the distributor 68 by two conduits 69, 70.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Water Supply & Treatment (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Nanotechnology (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Filtration Of Liquid (AREA)
- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
- Saccharide Compounds (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
Description
Claims
Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU64480/00A AU6448000A (en) | 1999-06-15 | 2000-06-14 | Piston pump, method and installation for filtering water |
US10/009,017 US6652741B1 (en) | 1999-06-15 | 2000-06-14 | Piston pump, method and installation for filtering water |
CA002412378A CA2412378A1 (fr) | 1999-06-15 | 2000-06-14 | Pompe a pistons, procede et installation de filtration d'eau |
DE60012530T DE60012530T2 (de) | 1999-06-15 | 2000-06-14 | Kolbenpumpe, verfahren und anlage zum filtrieren von wasser |
AT00951586T ATE272173T1 (de) | 1999-06-15 | 2000-06-14 | Kolbenpumpe, verfahren und anlage zum filtrieren von wasser |
JP2001503428A JP4659310B2 (ja) | 1999-06-15 | 2000-06-14 | 水を濾過するためのピストンポンプを備えた揚水装置及び同揚水装置を用いて海水を脱塩する方法 |
EP00951586A EP1194691B1 (fr) | 1999-06-15 | 2000-06-14 | Pompe a pistons, procede et installation de filtration d'eau |
HK02107202.7A HK1045869B (zh) | 1999-06-15 | 2002-09-30 | 活塞泵,過濾水的方法及裝置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/07795 | 1999-06-15 | ||
FR9907795A FR2795141B1 (fr) | 1999-06-15 | 1999-06-15 | Pompe a pistons, procede et installation de filtration d'eau |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000077397A1 true WO2000077397A1 (fr) | 2000-12-21 |
Family
ID=9547021
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/001642 WO2000077397A1 (fr) | 1999-06-15 | 2000-06-14 | Pompe a pistons, procede et installation de filtration d'eau |
Country Status (14)
Country | Link |
---|---|
US (1) | US6652741B1 (fr) |
EP (1) | EP1194691B1 (fr) |
JP (1) | JP4659310B2 (fr) |
AT (1) | ATE272173T1 (fr) |
AU (1) | AU6448000A (fr) |
CA (1) | CA2412378A1 (fr) |
DE (1) | DE60012530T2 (fr) |
ES (1) | ES2223556T3 (fr) |
FR (1) | FR2795141B1 (fr) |
HK (1) | HK1045869B (fr) |
MA (1) | MA25421A1 (fr) |
PT (1) | PT1194691E (fr) |
TN (1) | TNSN00132A1 (fr) |
WO (1) | WO2000077397A1 (fr) |
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US20150298062A1 (en) * | 2012-07-31 | 2015-10-22 | Ronghui Zhu | Membrane seawater desalination pressurization and energy recovery integrated method and device |
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FR2850038B1 (fr) * | 2003-01-20 | 2005-03-18 | Sebastien Racagel | Dispositif de purification de liquide a osmose inversee |
AU2005252262B2 (en) * | 2004-06-07 | 2011-07-28 | Hitech Hippo Australia Ltd | A pump assembly |
WO2005121555A1 (fr) * | 2004-06-07 | 2005-12-22 | Hunter Hitech Pty Ltd | Ensemble pompe |
US7140429B2 (en) * | 2004-10-04 | 2006-11-28 | Nord Service Inc. | Device for cutting of slot-like key seats in wells by a hydroabrasive method |
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WO2010044147A1 (fr) * | 2008-10-15 | 2010-04-22 | Ikuta Kazumasa | Dispositif d’alimentation en pression d’un fluide |
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FR2953566B1 (fr) * | 2009-12-08 | 2012-03-09 | Laurence Technologies Sa | Pompe a piston et installation de traitement d'eau equipee d'une telle pompe |
US9644761B2 (en) | 2011-09-30 | 2017-05-09 | General Electric Company | Desalination system with energy recovery and related pumps, valves and controller |
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FR2981704B1 (fr) | 2011-10-25 | 2013-12-20 | Arkling Ltd | Echangeur de pression volumetrique pour une installation de dessalement d'eau de mer et installation de dessalement |
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US3707881A (en) * | 1970-03-12 | 1973-01-02 | Uhde Gmbh Friedrich | Control system for hydraulic fluid-feed mechanism |
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FR2689421A1 (fr) * | 1992-04-01 | 1993-10-08 | Lebruno Roland | Pompe haute pression pour pulvérisation de peinture destinée aux machines de marquage routier. |
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- 2000-06-14 CA CA002412378A patent/CA2412378A1/fr not_active Abandoned
- 2000-06-14 ES ES00951586T patent/ES2223556T3/es not_active Expired - Lifetime
- 2000-06-14 AU AU64480/00A patent/AU6448000A/en not_active Abandoned
- 2000-06-14 EP EP00951586A patent/EP1194691B1/fr not_active Expired - Lifetime
- 2000-06-14 PT PT00951586T patent/PT1194691E/pt unknown
- 2000-06-14 WO PCT/FR2000/001642 patent/WO2000077397A1/fr active IP Right Grant
- 2000-06-14 US US10/009,017 patent/US6652741B1/en not_active Expired - Fee Related
- 2000-06-14 DE DE60012530T patent/DE60012530T2/de not_active Expired - Lifetime
- 2000-06-14 JP JP2001503428A patent/JP4659310B2/ja not_active Expired - Fee Related
- 2000-06-14 AT AT00951586T patent/ATE272173T1/de not_active IP Right Cessation
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2002
- 2002-01-14 MA MA26485A patent/MA25421A1/fr unknown
- 2002-09-30 HK HK02107202.7A patent/HK1045869B/zh not_active IP Right Cessation
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FR1396282A (fr) * | 1964-05-27 | 1965-04-16 | Worthington Corp | Pompe à déplacement positif et à capacité variable |
US3707881A (en) * | 1970-03-12 | 1973-01-02 | Uhde Gmbh Friedrich | Control system for hydraulic fluid-feed mechanism |
DE2249683A1 (de) * | 1972-10-11 | 1974-04-25 | Walter Gmbh Hellmuth | Hydraulisch angetriebene kolbenpumpe, insbesondere dosierpumpe |
US4913809A (en) * | 1988-06-29 | 1990-04-03 | Sasakura Engineering Co., Ltd. | Concentrating apparatus with reverse osmosis membrane |
US4929347A (en) * | 1988-07-11 | 1990-05-29 | Sasakura Engineering Co., Ltd. | Concentrating apparatus with reverse osmosis membrane |
FR2689421A1 (fr) * | 1992-04-01 | 1993-10-08 | Lebruno Roland | Pompe haute pression pour pulvérisation de peinture destinée aux machines de marquage routier. |
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Publication number | Priority date | Publication date | Assignee | Title |
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EP1358407A2 (fr) * | 2001-01-19 | 2003-11-05 | Munters Corporation | Pompe a eau haute pression |
EP1358407A4 (fr) * | 2001-01-19 | 2004-08-11 | Munters Corp | Pompe a eau haute pression |
US9371922B2 (en) | 2009-11-16 | 2016-06-21 | Arkling Limited | Valve having a rotatable stopper, and water treatment plant comprising such a valve |
US20150298062A1 (en) * | 2012-07-31 | 2015-10-22 | Ronghui Zhu | Membrane seawater desalination pressurization and energy recovery integrated method and device |
US9597638B2 (en) * | 2012-07-31 | 2017-03-21 | Ronghui Zhu | Membrane seawater desalination pressurization and energy recovery integrated method and device |
CN102937074A (zh) * | 2012-11-12 | 2013-02-20 | 三一重工股份有限公司 | 连续供料***及其控制方法、登高平台消防车 |
CN102937074B (zh) * | 2012-11-12 | 2015-06-10 | 三一汽车制造有限公司 | 连续供料***及其控制方法、登高平台消防车 |
US9233340B1 (en) * | 2015-01-13 | 2016-01-12 | Renergy Technologies Ltd. | Cylinder arrangement and method of use for energy recovery with seawater desalination |
Also Published As
Publication number | Publication date |
---|---|
FR2795141B1 (fr) | 2001-09-07 |
TNSN00132A1 (fr) | 2002-05-30 |
EP1194691A1 (fr) | 2002-04-10 |
HK1045869B (zh) | 2004-12-31 |
ATE272173T1 (de) | 2004-08-15 |
DE60012530D1 (de) | 2004-09-02 |
JP2003502544A (ja) | 2003-01-21 |
FR2795141A1 (fr) | 2000-12-22 |
MA25421A1 (fr) | 2002-04-01 |
DE60012530T2 (de) | 2005-09-15 |
AU6448000A (en) | 2001-01-02 |
US6652741B1 (en) | 2003-11-25 |
CA2412378A1 (fr) | 2000-12-21 |
HK1045869A1 (en) | 2002-12-13 |
JP4659310B2 (ja) | 2011-03-30 |
PT1194691E (pt) | 2004-11-30 |
EP1194691B1 (fr) | 2004-07-28 |
ES2223556T3 (es) | 2005-03-01 |
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